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Please use the five-step process for hypothesis testing
The Connecticut Board of Education is concerned that first year female high school teachers are receiving lower salaries than their male counterparts. Two independent random samples have been selected: 830 observations from population 1 (female high school teachers) and 810 from population 2 (male high school teachers). The sample means obtained are X1(bar) = $46,000 and X2(bar) = $47,000. It is known from previous studies that the population variances are 4.5 and 5.0 respectively. Using a level of significance of .01, is there evidence that the first year female high school teachers are receiving lower salaries? Fully explain your answer.
What is the total expected annual inventory cost at the optimal order quantity? What is the re-order point?
The flashlight batteries produced by one of the northern manufacturers are known to have an average life of 60 hours with a standard deviation of 4 hours. Use Chebyshev's theorem to answer the following questions.
A random sample of 346 individuals is selected, and the individuals are classified according to their smoking habits and the smoking habits of their parents. The results are given in the contingency table below.
What information is provided by the numeral value of the Pearson correlation? What is the major distinction between the Pearson and Spear man correlations?
Determine probability that student was sophomore? Determine the probability of selecting a face card from deck of 52 cards.
Suppose it costs $25 per student for the administrators to provide the course materials.
A doctoral student is designing a research study. She is hoping that the results of the study are statistically significant. What type of p-value would she want to obtain? Select one of the following.
Using the Wilcoxon Signed-Ranks Test. Paired sample data and use the Wilcoxon signed-ranks test to test the claim that the matched pairs have differences that come from a population with a median equal to zero.
If, 20 patients improved, 7 declined, and 3 remained the same, assess whether or not patients undergoing this treatment are showing significant change from baseline to 3 months afterward. Report a p-value.
Her results (in hours until turning a particular shade of brown) are in the table below. At ∞= .01, did she see a difference between the two treatments?
Graphical method to solveout the linear programming problem. Describe where the following TEO constraints intersect.
Now make a scatter plot of data from 1982 to 1998 (again, use years since 1800). Determine a linear, power, or exponential model that explains the crude oil production during this time period.
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